batgrbproduct Analysis for Trigger=611599
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Wed Sep 3 23:49:23 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger611599/GCN5_download_cron
======================================================================
Trigger: 00611599 Segment: 000
BAT Trigger Time: 431449242.7 [s; MET]
Trigger Stop: 431449242.764 [s; MET]
UTC: 2014-09-03T15:00:30.220440 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 238.036254941297 Dec: 27.5784667537245 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.57
Image Trigger?: NO
Rate S/N Ratio: 44.4747119158742 [ if not an image trigger ]
Image S/N Ratio: 12.57
Flight Position: [ source = BAT ]
RA: 238.036254941297 Dec: 27.5784667537245 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 238.021197843449 Dec: 27.6075432324579 [deg; J2000]
{ 15h 52m 05.1s , +27d 36' 27.2" }
+/- 1.03441829277118 [arcmin] (estimated 90% radius based on SNR)
+/- 0.357874944203395 [arcmin] (formal 1-sigma fit error)
SNR: 28.9816975516066
Angular difference between Flight and Ground position is 1.919548 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 0.295999944210052 +/- 0.0341760284313824
Measured from: 0.00400012731552124
to: 0.300000071525574 [s; relative to TRIGTIME]
T50: 0.13999992609024 +/- 0.0178885534162405
Measured from: 0.048000156879425
to: 0.188000082969666 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.329999983310699
to: 0.670000016689301 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0119999647140503
to: 0.34799998998642 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.094968 0.108160 0.054920 0.006803
0.005642 0.005944 0.004677 0.003229 [error]
Peak 0.113549 0.116368 0.063021 0.003394
0.007266 0.007658 0.006109 0.004649 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 2.95e-08 4.04e-08 4.08e-08 7.47e-08 1.35e-07 1.85e-07 erg/cm2
Error 2.87e-09 2.67e-09 4.36e-09 1.58e-08 1.02e-08 2.05e-08 erg/cm2
Peak flux Power-law 1.12e+00 8.28e-01 4.06e-01 2.83e-01 2.49e+00 2.64e+00 ph/cm2/s
Error 1.24e-01 6.18e-02 5.01e-02 6.68e-02 1.88e-01 1.97e-01 ph/cm2/s
Fluence Cutoff-PL 2.77e-08 4.35e-08 4.04e-08 2.79e-08 1.28e-07 1.39e-07 erg/cm2
Error 3.20e-09 3.63e-09 4.88e-09 2.20e-08 1.13e-08 2.48e-08 erg/cm2
Peak flux Cutoff-PL 1.07e+00 8.72e-01 4.07e-01 1.54e-01 2.44e+00 2.50e+00 ph/cm2/s
Error 1.40e-01 8.03e-02 5.41e-02 1.03e-01 1.94e-01 2.28e-01 ph/cm2/s
Fluence Band 2.68e-08 4.46e-08 3.83e-08 5.28e-08 1.29e-07 1.63e-07 erg/cm2
Error 3.37e-09 -------- 4.87e-09 -------- 1.08e-08 2.40e-08 erg/cm2
Peak flux Band 1.10e+00 8.72e-01 4.14e-01 1.87e-01 2.50e+00 2.57e+00 ph/cm2/s
Error 1.06e-01 -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.986 0.120 - - 4.06e-02 3.19e-03 76.300 57
CPL 1.355 0.518 44.3 13.9 9.21e-02 6.91e-02 71.160 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.027 0.142 - - 1.64e-02 1.52e-03 51.930 57
CPL 1.566 0.565 40.4 0.0 2.99e-02 0.00e+00 49.710 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 0.192000 sec.
T50 in the 50-300 keV band: 0.128000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.360 -0.012 0.348
T90 0.296 0.004 0.300
T50 0.140 0.048 0.188
Peak 1.000 -0.330 0.670
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
238.0212 +27.6075 0.0066 16.8 122.4 0.2810 29.0 TRIG_00611599
------------------------------------------
Foreground time interval of the image:
-0.012 0.348 (delta_t = 0.360 [sec])
Background time interval of the image:
-154.099 -0.012 (delta_t = 154.087 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.012 sec. to 0.348 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98552 ( -0.118445 0.121971 )
Norm@50keV : 4.05785E-02 ( -0.00321119 0.0031698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.30 using 59 PHA bins.
# Reduced chi-squared = 1.339 for 57 degrees of freedom
# Null hypothesis probability = 4.482129e-02
Photon flux (15-150 keV) in 0.36 sec: 6.04663 ( -0.407098 0.40739 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34618e-07 ( -1.01528e-08 1.02385e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.012 sec. to 0.348 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35485 ( -0.551205 0.483831 )
Epeak [keV] : 44.2692 ( -11.7852 16.0749 )
Norm@50keV : 9.20731E-02 ( -0.0422255 0.0958892 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.16 using 59 PHA bins.
# Reduced chi-squared = 1.271 for 56 degrees of freedom
# Null hypothesis probability = 8.350455e-02
Photon flux (15-150 keV) in 0.36 sec: 5.90819 ( -0.41959 0.41981 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27639e-07 ( -1.12248e-08 1.14289e-08 ) ergs/cm2
Band function
Time interval is from -0.012 sec. to 0.348 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.35468 ( -0.481355 0.547256 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 44.2619 ( -11.7561 16.0729 )
Norm@50keV : 9.20785E-02 ( -0.0422505 0.0959452 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.16 using 59 PHA bins.
# Reduced chi-squared = 1.294 for 55 degrees of freedom
# Null hypothesis probability = 7.033435e-02
Photon flux (15-150 keV) in 0.36 sec: 5.93515 ( 1.06485 -0.45255 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29275e-07 ( -1.29273e-07 -1.07345e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.2126 ( )
R^2/D10^2 : 2.60460 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 114.64 using 59 PHA bins.
# Reduced chi-squared = 2.0111 for 57 degrees of freedom
# Null hypothesis probability = 9.408528e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.005e-08 2.318e-09
25- 50 5.135e-08 3.672e-09
50-150 2.847e-08 4.939e-09
15-150 9.988e-08 7.812e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 69.7111 (-12.7132 17.4066)
Norm : 29.8079 (-3.14704 3.57586)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.11 using 59 PHA bins.
# Reduced chi-squared = 1.247 for 57 degrees of freedom
# Null hypothesis probability = 9.906039e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.752e-08 2.387e-09
25- 50 4.373e-08 3.168e-09
50-150 5.600e-08 8.712e-09
15-150 1.273e-07 1.035e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.56171 (-1.0396 1.04861)
R1^2/D10^2 : 10.3836 (-4.15233 8.56475)
kT2 [keV] : 21.8191 (-4.5175 7.24353)
R2^2/D10^2 : 9.10569E-02 (-0.0608162 0.147392)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.77 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 55 degrees of freedom
# Null hypothesis probability = 1.156942e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.695e-08 5.405e-09
25- 50 4.422e-08 9.524e-09
50-150 5.802e-08 2.796e-08
15-150 1.292e-07 3.652e-08
Peak spectrum fit
Power-law model
Time interval is from -0.330 sec. to 0.670 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.02681 ( -0.139024 0.144496 )
Norm@50keV : 1.63839E-02 ( -0.00153489 0.00150882 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.93 using 59 PHA bins.
# Reduced chi-squared = 0.9111 for 57 degrees of freedom
# Null hypothesis probability = 6.650963e-01
Photon flux (15-150 keV) in 1 sec: 2.48837 ( -0.187918 0.188023 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.51327e-07 ( -1.31933e-08 1.33524e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.330 sec. to 0.670 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56552 ( -0.602467 0.526984 )
Epeak [keV] : 40.4436 ( )
Norm@50keV : 2.99225E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.71 using 59 PHA bins.
# Reduced chi-squared = 0.8877 for 56 degrees of freedom
# Null hypothesis probability = 7.102918e-01
Photon flux (15-150 keV) in 1 sec: 2.44335 ( -0.1943 0.19441 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45184e-07 ( -1.464e-08 1.4985e-08 ) ergs/cm2
Band function
Time interval is from -0.330 sec. to 0.670 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.56601 ( 1.81106 0.933009 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 40.4343 ( -22.6063 -40.4343 )
Norm@50keV : 2.98976E-02 ( -0.0137455 0.0354737 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.71 using 59 PHA bins.
# Reduced chi-squared = 0.9039 for 55 degrees of freedom
# Null hypothesis probability = 6.762006e-01
Photon flux (15-150 keV) in 1 sec: 2.49621 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.45088e-07 ( -1.45081e-07 -1.4642e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.92552 (-0.915617 1.01873)
R^2/D10^2 : 1.17198 (-0.369025 0.534326)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.46 using 59 PHA bins.
# Reduced chi-squared = 1.587 for 57 degrees of freedom
# Null hypothesis probability = 3.158037e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.345e-08 3.000e-09
25- 50 5.770e-08 5.275e-09
50-150 2.947e-08 5.840e-09
15-150 1.106e-07 1.015e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.6997 (-13.6353 19.1176)
Norm : 12.4903 (-1.51738 1.7357)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.23 using 59 PHA bins.
# Reduced chi-squared = 0.8812 for 57 degrees of freedom
# Null hypothesis probability = 7.252049e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.181e-08 3.190e-09
25- 50 4.972e-08 3.805e-09
50-150 6.086e-08 1.053e-08
15-150 1.424e-07 1.345e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.73907 (-1.09787 1.15752)
R1^2/D10^2 : 6.92774 (-3.36584 8.65493)
kT2 [keV] : 19.6330 (-3.95135 6.17297)
R2^2/D10^2 : 5.95371E-02 (-0.0393546 0.0920261)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.11 using 59 PHA bins.
# Reduced chi-squared = 0.8747 for 55 degrees of freedom
# Null hypothesis probability = 7.332129e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.282e-08 1.015e-08
25- 50 4.756e-08 1.155e-08
50-150 6.442e-08 3.407e-08
15-150 1.448e-07 4.459e-08
Plot creation:
Wed Sep 3 23:52:41 EDT 2014